Printable Hard Sudoku

Set y4a389. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
4 6 2 8 9 3
1 8 5
1 5 6
3 4 5
1 7 5 4
2 4 9 7
3
7 8
2 7 9
Hard #2
8
5 1 7 4
3 6 5
5 8 6 1
2 7 3 9
6 4
8 6 7
4 3 7 9 2 1
7 2
Hard #3
4 6 7
7 9 6 2
2 5
9 1 5 3
6 2 7
3 5 2
3 8 4
9 3
5 7 8 6 9
Hard #4
1 8 2 4
8 5 6 7
1 4 6
8 5 3 2
6 7
5 2
2 9 7
1 6 3
9 3 7 5
Hard #5
4 5 9
7 9 3 8
4 3 5
2 7 3 5 1 9
1 8 2
4 2 5
8 9 7
1
3 6 4
Hard #6
2 4
4 3 1 5 9 7
4 3
8 4 6 2
3 2 5
7 4
9 8 2
6 9 5 3
5 7 6
Hard #7
3
4 5 8 6
8 1 2 9
2 7 6 4
7 6 1
4 6 5
8 6 5 7 3
2 6
1 9 5
Hard #8
6 1 8
4 5 8 3 2
5 4
8 2 7
7 9 5
2 3
7 8 4 6
1 8 9
5 7 3 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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